T-SHIRT AND DARK SHORTS. IF YOU SEE HIM, PLEASE CALL THE SACRAMENTO COUNTY SHERIFF'S DEPARTMENT. JOINING US LIVE WITH THE DETAILS -- THIS WAS THE FIRST TIME JURORS HEARD TESTIMONY IN COURT HEARING ON -- IN COURT. ON TRIAL IS DANIEL MARSH. DANIEL MARSH AT TIMES SMILED AND AT TIMES LOOKED EXPRESSIONLESS. BUT WHEN PROSECUTORS BEGAN DESCRIBING HOW THE COUPLE WAS KILLED, THE TEENAGER CLOSED HIS EYES AND DROPPED HIS HEAD. THE PROSECUTOR CALLED MARSH CALCULATED AND CUNNING AND SAID OLIVER NORTHROP AND HIS WIFE WERE TORTURED, STABBED MORE THAN 60 TIMES EACH AND MUTILATED IN THEIR DAVIS HOME. AMONG THE PEOPLE IN DURING THOSE OPENING STATEMENTS WERE FAMILY MEMBERS. NOT EASY. NOT EASY AT ALL. THAT IS OUR CRIMINAL JUSTICE SYSTEM AND IT IS WHAT IT IS AND THAT IS THE WAY WE HAVE TO PROCEED. MARSH TOLD INVESTIGATORS THAT, WHILE KILLING THE COUPLE, HE FELT BOTH EXCITED, NERVOUS, EXHILARATED. HE HAS LED NOT GUILTY BY REASON OF INSANITY AND ME DEFENSE ATTORNEYS SAY THAT IT IS NOT SO MUCH WHAT HAPPENED ON THAT DAY BUT WHY. HE SAYS THAT MARSH WAS ACTING ON THE SIDE EFFECTS OF ANTIDEPRESSANT DRUGS THAT HAVE CITED X. -- THAT HAVE SIDE AFFECTS. OPENING STATEMENTS WRAPPED UP THIS AFTERNOON AND THE JURY HEARD TESTIMONY FROM THREE OFFICERS WHO RESPONDED TO THE SCENE OF THE CRIME THE NEXT DAY. HOW DID DANIEL MARSH WIND UP IN THAT HOME OF ALL THE HOMES HE COULD HAVE CHOSEN IN HIS NEIGHBORHOOD? MORE TONIGHT ON THE WAY PROSECUTORS SAY HE HUNTED DOWN HIS THICK.